JPH0480314B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a refrigeration system that separates liquid refrigerant from gas refrigerant, stores the liquid refrigerant, and smoothly flows the gas refrigerant toward the suction line of a compressor. Relating to an inhalation acumulator for. In particular, the invention relates to a suction accumulator which has a high efficiency and is compact compared to suction acumulators according to the known art. Furthermore, the present invention relates to a suction acumulator which is lower in cost than suction acumulators based on the prior art.

<Prior Art> Closed loop refrigeration systems based on the prior art use a refrigerant that is usually a gas and can be compressed by a compressor. The refrigerant is compressed to a relatively high pressure by the compressor, then passes through a condenser coil and an evaporator coil, and is returned to the compressor to be compressed again. In special cases, such as when starting up a refrigeration system, the refrigerant at the outlet of the evaporator may consist of a liquid. Also, under certain operating conditions, there may be a significant amount of liquid refrigerant in the evaporator, and excess liquid refrigerant may enter the suction line and be returned to the compressor. When liquid refrigerant enters the suction side of the compressor, a slugging condition occurs, creating abnormally high pressures within the compressor that can damage gaskets and valves.

Accordingly, suction accumulators have been used in the past to function as storage containers for liquid refrigerant and to prevent liquid refrigerant from entering the compressor. Suction accumulators of known type allow liquid refrigerant to become gaseous refrigerant before entering the compressor. Numerous types of suction accumulators have been proposed in the past, some examples being disclosed in U.S. Pat.
It is disclosed in specifications such as No. 4009596, No. 4182136, No. 4194370, No. 4194371, or No. 4208887. In all of these suction accumulators, the gas refrigerant is separated from the liquid refrigerant,
Liquid refrigerant is stored in a container, and gaseous refrigerant is directed from the container toward an outlet and may be directed toward a suction port of a compressor. The suction accumulator thus acts as a storage container for the liquid refrigerant, and after the required time has elapsed, it evaporates the liquid refrigerant into gaseous refrigerant and delivers the gaseous refrigerant to the compressor. Such suction accumulators have conventionally been equipped with a metering mechanism that meters the liquid refrigerant and sends it to the outlet of the accumulator in order to control the flow of liquid refrigerant toward the suction section of the compressor in order to prevent the above-mentioned slagging. There is.

Prior art suction accumulators include various types of deflection plates or baffles for separating liquid refrigerant from gaseous refrigerant. However, one problem with structures based on the prior art is that the liquid refrigerant is not completely separated from the gaseous refrigerant, so that a certain amount of liquid refrigerant enters the suction port of the compressor, and in some cases, the above-mentioned This results in a slugging problem.

Another suction accumulator based on the prior art
One problem is that the pressure drop across the suction accumulator, especially across the butthole, is quite large. Such a pressure drop represents a loss of work and has the undesirable effect of reducing the efficiency of a refrigeration system equipped with this suction accumulator.

Yet another problem with suction accumulators according to the prior art is that the incoming refrigerant agitates the stored liquid refrigerant, thereby causing the liquid refrigerant to be thrown up towards the outlet of the suction accumulator. Furthermore, in some suction accumulators, the stored liquid is separated into a lubricating oil portion and a refrigerant portion at a certain temperature, and a refrigerant containing less lubricating oil is supplied to the compressor. , a problem arises in that the lubricating oil inside the compressor tends to run out. This causes damage to the compressor bearings.

A further problem with the prior art suction accumulators is their relatively large dimensions.
Since the installation space is severely limited depending on the application, it is preferable to downsize the suction accumulator as much as possible. In addition, UA (Underwriter)
According to the National Laboratories Standards, fusible plugs are required in suction acumulator vessels larger than 76.2 mm (3 inches) in diameter, which increases costs. On the other hand, the diameter is 76.2mm (3
According to known suction accumulators with a diameter of 1 inch or less, it is difficult to ensure a sufficient flow rate of refrigerant. Therefore, it has been desired to provide a suction accumulator that has a diameter of 76.2 mm (3 inches) or less and that can ensure a sufficient flow rate of refrigerant. It would also be desirable to provide a suction accumulator with a simple yet effective pressure equalization structure.

Yet another problem with prior art suction acumulators is that they are relatively expensive to manufacture. Prior art suction accumulators generally consisted of metal parts that had to be assembled by soldering or brazing to form a gas-tight seal. Accordingly, it would be desirable to provide an economical suction accumulator that can be assembled at a lower cost than suction accumulators based on the prior art.

<Problems to be Solved by the Invention> It is an object of the present invention to solve the above-mentioned drawbacks of the suction accumulator based on the prior art and to provide an improved suction accumulator.

A primary object of the present invention is to provide a suction accumulator that is efficient, has low manufacturing costs, and is capable of effectively separating liquid refrigerant from gaseous refrigerant.

A second object of the present invention is to provide an improved suction accumulator so that the pressure drop experienced before and after the deflection buffle is small.

A third object of the present invention is to provide a suction accumulator that can smoothly introduce gas and liquid refrigerant into a container without disturbing the stored liquid refrigerant.

A fifth object of the present invention is to provide a suction accumulator that forms an airtight seal between the buttful and the upper end wall of the casing to prevent the btsful from being bypassed by refrigerant under high pressure conditions. It's about doing.

A sixth object of the present invention is to introduce the refrigerant along the axial direction of the suction accumulator casing and smoothly change the flow direction of the refrigerant by buffling with almost no pressure drop. The object of the present invention is to provide a suction accumulator that is introduced into a container along the tangential direction of the cylindrical inner peripheral surface.

A seventh object of the invention is to provide a simple yet effective pressure equalization structure.

SUMMARY OF THE INVENTION According to one aspect of the invention, upper and lower end walls are provided to define a liquid storage container. The inlet and outlet of the container are provided in the upper part of the casing. A baffle is provided in the upper portion of the container to effect gas-liquid separation by redirecting the flow of the incoming refrigerant to give it a helical motion. The refrigerant is thus given a tangential swirling motion along the inner wall surface of the cylindrical casing. The gaseous refrigerant is sent toward the outlet, and the liquid refrigerant flows down along the wall of the cylindrical casing and joins the liquid refrigerant stored in the container.

An embodiment of a suction acumulator according to the invention has a generally cylindrical casing with two end walls. A fluid outlet is connected to a conduit provided along the axial direction within the cylindrical casing. A buttle provided at the top of the casing surrounds the outlet, redirects the flow from the inlet into the casing, and creates a sealed, generally downwardly spiraling conduit to impart a helical motion to the fluid flow. It is defined. The refrigerant flows spirally along the cylindrical wall of the casing, and the liquid refrigerant is separated from the gas refrigerant by centrifugal force, flows downward along the casing wall, and joins the liquid stored in the lower part of the container. The gaseous refrigerant will first flow upwardly within the container and then downwardly within the conduits that guide the gaseous refrigerant toward the outlet of the container.

One advantage of the inhalation accumulator according to the invention is that it is efficient, compact and low cost.

Another advantage of the suction accumulator according to the invention is that the direction of the incoming refrigerant flow can be actively changed from vertical to horizontal with only a very small pressure drop.

A further advantage of the suction accumulator according to the invention is that it completely separates the liquid refrigerant from the gaseous refrigerant and prevents the liquid refrigerant from entering the suction line of the compressor.

A further advantage of the suction accumulator according to the invention is that the refrigerant is smoothly introduced into the container without stirring the liquid stored in the container. This advantage is particularly significant during valve reversal operation of heat pump systems.

A further advantage of the suction accumulator according to the invention is that the liquid introduced into the container flows in a helical manner, thereby creating a swirling mixing effect on the stored liquid. This advantage is significant where certain lubricating oils tend to phase separate from liquid refrigerants under low temperature conditions.
The stored liquid is thus separated into a lower refrigerant layer and an upper lubricant-rich layer. According to the present invention, since rotational motion is applied to the stored liquid, the mixture of lubricating oil and refrigerant is maintained in a generally uniform state.

Yet another advantage of the present invention is that it provides a suction accumulator that provides a simple and effective pressure equalization system.

Certain embodiments of suction acumulators according to the present invention have a casing having upper and lower end walls and defining a liquid storage container. A fluid inlet is provided in the casing to provide a flow path for fluid into the casing. A baffle is provided in the casing for sealing the fluid flowing into the casing from the fluid inlet so that the fluid flows along the tangential direction of the wall of the casing and is then introduced into the container. .

One embodiment of a suction acumulator according to the present invention has a cylindrical casing having upper and lower end walls and defining a liquid reservoir. A fluid inlet is provided in the upper end wall of the casing, and a fluid outlet is provided in the casing. A generally cylindrical baffle is provided within the casing to seal and redirect fluid entering the casing from the inlet. The baffle defines a generally helical flow path, causing flow that is generally axially oriented at the fluid inlet to be generally helical as the fluid flows from the baffle toward the container. A long conduit oriented in the axial direction is provided inside the casing, and this conduit is connected to approximately the center of the buttful, so that fluid flows from the container to the long conduit and the center of the buttful. The liquid then flows towards the fluid outlet.

Certain embodiments of the suction accumulator according to the present invention include a generally cylindrical casing having upper and lower end walls and defining a liquid reservoir. A fluid inlet and a fluid outlet are provided in the upper end wall. An elongated conduit is provided axially within the casing and defines a downward flow passage and an upward flow passage. One end of the downward flow passage is open into the container. The upward flow passage and the downward flow passage communicate with each other. The upward flow passageway is connected to the fluid outlet and defines a fluid passageway from the container to the outlet. A buttle is provided within the casing, the buttle defining a sealed flow path and having a generally helical wall surrounding the fluid outlet, an arcuate upright peripheral wall, and a generally helical inner wall. It is equipped with The baffle receives the fluid introduced from the fluid outlet and changes the direction of the fluid in a generally horizontal direction along a tangential direction with respect to the side wall of the casing.
The arcuate outer wall of the baffle is spaced relative to the inner wall of the baffle so that fluid flows from the baffle downwardly toward the container.

<Examples> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the suction accumulator 10 includes a cylindrical casing 12 having an upper end wall 14 secured thereto by welding or other suitable means, as indicated by the numeral 15. There is. Casing 12 has a lower end wall 16, indicated at 17, secured to casing 12 by welding or other suitable means. In this way, the casing 12 and the end walls 14, 16 define a sealed liquid container 18.

The upper end wall 14 has a fluid inlet 20 hermetically secured to the upper end wall 14 by brazing or soldering, as indicated by the numeral 21. The upper end wall 14 further includes a fluid outlet 22, indicated by the numeral 24, secured thereto by brazing or other suitable means. long pipe 3
0 extends vertically within the container 18.
Fluid outlet 22 is press fit into upward flow passage 34 . The pipe line 30 has a partition wall part 3 that divides the inside thereof into an upward flow passage 34 and a downward flow passage 36.
It has 2. Conduit 30 is located in Indiana, USA.
By General Electric Company located in Mt.Vernon
It is preferably made of an extruded synthetic resin material such as that manufactured under the trade name ULTEM 1000. A synthetic resin cap 38 is sealably secured to the lower end of the conduit 30. Cap 38 is
It can be fixed to the pipe line 30 by appropriate means such as melting or press-fitting using an adhesive. Cap 38 has a spacer 40 and a screen 42 disposed within the spacer. Therefore, conduit 3
0 and cap 38 are tightly clamped between portion 43 of end wall 16 and fluid outlet 22. Cap 38 further includes a conduit 46 extending generally upwardly from spacer 40 . Conduit 46 has an orifice 44 open toward the lower portion of upward flow passage 34 . Cap 38, conduit 46
Preferably, the spacer 40 is an integral molded member made of a synthetic resin material manufactured under the trade name ULTEM 2300 by General Electric Co., Mt. Vernon, Indiana, USA.

Line 30 has a pair of pressure equalization passages 48 to equalize the pressures that develop within the suction accumulator under certain conditions. Such a condition occurs, for example, when a compressor of a refrigeration system is shut down. If passageway 48 were not provided, under the conditions described above, the pressure in the system would increase and upward flow passageway 34 and downward flow passageway 36 would fill with liquid refrigerant, causing the liquid refrigerant to enter the compressor suction. It flows into the port and causes slagging when the compressor starts operating again. If the level of liquid refrigerant in vessel 18 is higher than the bottom of line 30, liquid refrigerant will fill cap 38 through orifice 44, thereby quickly sealing passageways 34,36. If a pressure equalization passage such as passage 48 is not provided, if passages 34 and 36 in line 30 are occluded, pressure equalization will not occur and the resulting differential pressure will cause liquid refrigerant to flow into line 38. and reaches the compressor, causing slugging when the compressor is started.
Pressure equalization passage 48 must be open toward the top of vessel 18 so that only gas can pass through passage 48 to effect pressure equalization between the compressor and the refrigeration system. A liquid seal at the bottom of conduit 30 necessitates a pressure equalization mechanism, such as passage 48, to preclude any pressure equalization that would otherwise occur through passages 34,36. Thus, by using passageway 48, gaseous refrigerant is transferred from container 18 to opening 80 and passageway 48.
and out of the lower inlet and outlet 22 of the upward flow passage 34. Stud bolts 50 are secured to recesses 52 in the lower end wall 16 so that the suction accumulator can be mounted in an upright position in a refrigeration system (not shown).

As shown in FIGS. 1 to 7, the baffle 60 has a spiral slope 62 and an inclined end 63 forming an approach path toward the slope 62. As shown in FIGS. Fourth
As best shown in the figures, the sloping end 63 is aligned with the fluid inlet 20, which is indicated by dashed lines to indicate its relative position to the portion. The wall surface of the inclined end surface 63 has an upper edge having a stepped portion 61 and is smoothly continuous with the arcuate upright side wall 64 . An arcuate upright outer wall 64 partially surrounds the buttful 60 and terminates at an edge 65.
The arcuate upright outer wall 64 also has a step 67 whose upper edge is complementary in shape to the inner surface of the upper end wall 14 . Buzzle 60 has a cylindrical wall portion 66 that aligns with and surrounds fluid outlet 22 .

As shown well in Figures 1 and 4,
When assembled within the casing 12, the baffle 60 is spaced apart from the inner circumferential surface of the casing 12 so as to define an annular cavity 68 therebetween. Therefore, the refrigerant introduced along the axial direction from the inlet 20 flows through the slope 62.
The liquid is deflected by 90 degrees by the sloped end 63 of the casing 12, spirally flows down along the slope 62, and eventually flows along the tangential direction of the cylindrical wall surface of the casing 12. This shows the condition of the area slightly beyond the edge 65 of the arcuate upright outer wall 64. At this point, the refrigerant is mixed with the buffer 60 and the cylindrical casing 1.
2 and flows toward the liquid storage portion of the container 18.

As shown in FIGS. 3 to 6, the slope 6
An inclined surface 70 is formed to smoothly transition from the cylindrical wall section 2 to the cylindrical wall section 66. The cylindrical wall portion 66 is connected via a gently sloped slope 73 to an arcuate helical surface 72 that continuously connects to an arcuate upright outer wall 64 . The shape of the sloped surface 73 is complementary to the shape of the upper end wall 14, so that the incoming fluid flows along the desired helical flow path. Furthermore, container 1
8 is diverted from a generally axial flow to a generally horizontal flow tangential to the inner wall surface of the casing 12 . The refrigerant is
The outwardly spiraling helical surface 72 directs flow outwardly from the baffle 60 into an annular cavity 68 between the buffle 60 and the cylindrical wall of the casing 12.

The baffle 60 has a central opening 74 through which the fluid outlet 22 passes. Fluid outlet 22 is forced into upward flow passage 34 so that refrigerant flows from vessel 18 through passages 34, 36 and outlet 22 toward central opening 74 of buffle 60. As best shown in FIG. 6, the buttful 60 has an opening 7 for engaging the conduit 30.
It has 6. The pipe line 30 is connected to the shoulder part 7 of the buttful 60.
8 , the buttle 60 is supported by the conduit 30 and the upper end edge 82 of the cylindrical wall portion 66 of the buttle sealably engages the upper end wall 14 . Furthermore, as mentioned above,
An arcuate upright outer wall 64 sealingly engages the upper end wall 14 . Therefore, the refrigerant flowing into the container 18 does not bypass the baffle 60 and is directed against the inner surface of the upper end wall 14, the spirally-shaped generally upward slope 62, the inner circumferential surface of the arcuate upright outer wall 64, Cylindrical wall section 66, inclined surface 70 and spiral surface 7
2 and an outer peripheral surface of the inner wall. Furthermore, as described above, the vent passage 4 is provided in the battleful 60.
8 and has an opening 80 for 8.

Batsuful 60 is Mt., Indiana, USA.
By General Electric Co., Vernon
Preferably, it is made of an integrally molded synthetic resin material such as the synthetic resin material manufactured under the trade name ULTEM 2300.

During actual operation, the refrigerant flowing toward the inlet 20 is deflected by the baffle 60 at the inlet portion (inclined end 63) forming an inclined surface, as shown by the arrow 84, and the refrigerant flows through the faces 62, 64, 66,7
0 and is sealed within a helical passageway defined by the end wall 14 of the casing 12. The refrigerant undergoes a generally horizontal spiral motion in a clockwise direction. The refrigerant is sealed within the helical passageway over an arcuate range of 130 degrees to 170 degrees, and the closure of the upright outer wall 64 at the edge 65 releases the seal. The refrigerant continues to move in a clockwise direction and is guided further outwardly by the helical surface 72 of the inner wall of the buttful. The refrigerant is guided by a helical surface 72 on the inner circumference of the buttle which is provided in a spiral that gradually expands outward to connect with the upright outer wall 64 of the buttle at the point where the refrigerant enters the container. , continues to flow in a clockwise direction. The gas refrigerant and the liquid refrigerant enter the container 1 through the annular cavity 68 between the buffer 60 and the casing 12.
8. Therefore, the flow direction of the inflowing refrigerant is positively and smoothly changed from the axial direction to the generally horizontal direction along the tangential direction of the wall surface of the casing with only a very small pressure drop.

The refrigerant enters the container while performing a spiral motion along the inner peripheral surface of the casing in the annular cavity 68 as shown by arrow 85, and the liquid refrigerant is separated from the gas refrigerant by centrifugal force. . The liquid refrigerant flows spirally downward along or near the inner circumferential surface of the casing and merges with the stored liquid. Gaseous refrigerants are separated from liquid refrigerants because they are less dense than liquid refrigerants. Batsuful 60 is
Due to the hanging piece 90, the gaseous refrigerant flows in the direction of the arrow 86.
As shown by , the flow first flows upwardly within the container and then flows downwardly into the downward flow passageway 36 of the conduit 30 . Since the gas refrigerant flows through the curved channel until reaching the passage 36, the liquid refrigerant does not reach the pipe line 30.

The gaseous refrigerant flows downwardly through the downward flow passage 36, is then diverted 180 degrees within the cap 38 as shown by arrow 88, and then flows upwardly within the upward flow passage 34 and outwardly from the outlet 22. It flows out.

An important advantage of the present invention is the relatively low pressure drop across the buffle 60. For example, in a 76.2 mm (3 inch) diameter suction acumulator with a relatively high flow rate, the pressure drop across the buttful is approximately 101.6 mm (4 inches) of water.
At low flow rates, the pressure drop is approximately 12.7 mm of water column
(0.5 inch). This low pressure drop is due to the smooth transition of the refrigerant flow direction from axial to helical rotational motion. Additionally, the closed passageway cross-sectional area defined by baffle 60 and end wall 14 also minimizes pressure drop.

Yet another important advantage of the invention is that
The point is that the liquid flowing into the container 18 from 0 does not unduly disturb the already stored liquid. The swirling motion of the liquid entering the container causes a swirling mixing motion on the already stored liquid. Therefore, at low temperatures such that certain lubricating oils undergo phase separation from gaseous refrigerants, the stored liquid separates into a refrigerant-rich layer at the bottom and a lubricant-rich portion at the top. Be able to deal with trends. for example,
R-22 refrigerant and Suniso 32GS (trade name) by Witco, New York, New York.
Naphtha-based oils sold as
Under quiet conditions, the phases separate at about 1.1°C (34°C). In this state, the lubricating oil-rich portion is above the orifice 44 and does not return to the compressor. If the compressor continues to operate in this state, a large amount of compressor oil will remain in the container, which may cause failure of the compressor bearings. however,
By giving a swirling motion to the liquid flowing downward along the inner circumferential surface of the container, the stored liquid is stirred and mixed insufficiently, thereby lubricating the stored liquid with the refrigerant. A homogeneous mixture of oil and oil can be maintained. On the other hand, the swirling motion of liquid flowing along or near the inner circumferential surface of the container does not disturb the stored liquid to the extent that it splashes liquid toward the downward flow passageway 34. This is particularly advantageous during valve reversal mode in heat pump systems.

8 to 13 show further embodiments of the suction accumulator according to the invention. Note that corresponding parts are given the same reference numerals and detailed explanation thereof will be omitted.

The baffle 100 is provided with a helical slope 102 having an inlet portion 101. Fins 104 are provided on the slope 102 so that the baffle 100 can be engaged with the inlet 20 so that the baffle 100 does not rotate relative to the inlet 20. Therefore, the incoming refrigerant is confined within the helical slope 102, the arcuate upright outer wall 110, the cylindrical inner wall portion 106 as the inner wall, and the upper end wall 14, and is approximately 90
The direction is changed and the flow becomes a spiral. Arcuate upright outer wall 1
10 terminates at a terminal end 112, and the refrigerant flows from the arcuate spiral slope 102 through the air 68 into the container 18.

The baffle 100 is provided with a cylindrical conduit section 113 having a bottom wall 115 with an opening 114 . Furthermore, the Batsuful 100 has a conduit 12
The conduit section 1 has a complementary shape to fit into the inner circumferential surface of the semi-cylindrical upward flow passage 126 of No. 4.
It has 18. Conduit 118 is fixed to conduit 124 by suitable means such as adhesive. Conduit 1
24 is a partition wall 130 for dividing the inside thereof into a downward flow passage 118 and an upward flow passage 126.
has.

As shown in FIGS. 8-11, the bottom wall 115 of the cylindrical conduit section 113 has a vent passage 116 for pressure equalization. Additionally, the cylindrical wall portion 106 has a bottom wall portion 120 to prevent gaseous refrigerant within the container 18 from flowing upwardly to the outside of the container 18.

In actual operation, the suction accumulators shown in FIGS. 8-13 operate generally in the same manner as the suction accumulators shown in FIGS. 1-7. A refrigerant consisting of a liquid refrigerant and a gas refrigerant flows in through the inlet 20 . The refrigerant is then diverted by the baffle 100 at the inlet portion 101 of the ramp 102 and enclosed within a helical passageway defined by the ramp 102, the arcuate upright outer wall 110, the cylindrical inner wall portion 106, and the upper end wall 14. be done. Figures 1 to 7
Similar to the illustrated embodiment, the refrigerant undergoes a generally horizontal swirling motion in a clockwise direction. When the refrigerant reaches the end 112 of the arcuate upright outer wall 110, the refrigerant flows from the helical ramp 102 through the cavity 68 and toward the container 18. Because the baffle 100 has a downwardly directed hanging piece 132, the gaseous refrigerant is forced to flow upward first and then downwardly through the downward flow passage 128. Since the refrigerant passage is bent in this manner, liquid refrigerant does not enter the passage 128. The liquid refrigerant is separated by centrifugal force, flows downward along the inner peripheral surface of the casing 12 while performing a swirling motion, and merges with the already stored liquid.

Inlet 22 is received in cylindrical conduit section 113;
The bottom wall 115 is open at the bottom.
Thus, vent passage 116 connects container 18 to outlet 2.
2 to allow equalization of the pressure in the suction accumulator when the refrigeration system compressor is shut down. This allows the upward flow passage 12
6 is not filled with liquid refrigerant, and slagging in the compressor at startup is avoided.

ADVANTAGES OF THE INVENTION Thus, the present invention provides an efficient, compact, and relatively inexpensive to manufacture suction accumulator, for example, including a molded or extruded synthetic resin component.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a suction accumulator according to the invention. FIG. 2 is a cross-sectional view taken along line 2--2 in FIG. FIG. 3 is an enlarged perspective view of the buttful. FIG. 4 is a cross-sectional view of the suction accumulator baffle and casing taken along line 4--4 in FIG. 1. FIG. 5 is a side view of the buttful shown in FIG. 3. FIG. 6 is a sectional view taken along line 6--6 in FIG. 4. FIG. 7 is a bottom view of the buttful shown in FIG. 3. FIG. 8 is a longitudinal sectional view showing a second embodiment of the suction accumulator according to the present invention. FIG. 9 is a plan view of the buttful shown in FIG. 8. Figure 10 is 1 of Figure 9.
FIG. 3 is a cross-sectional view taken along the 0-10 line. FIG. 11 is a side view of the buttful of FIG. 9. FIG. 12 is a bottom view of the buttful of FIG. 9. FIG. 13 is a sectional view taken along line 13--13 in FIG. 8. DESCRIPTION OF SYMBOLS 10... Suction acumulator, 12... Casing, 14... Upper end wall, 15... Part, 16... Lower end wall, 17... Part, 18... Container, 20... Inlet, 21
... part, 22... outlet, 24... part, 30... conduit,
32... Partition wall, 34, 36... Passage, 38... Cap, 40... Spacer, 42... Screen, 43...
Part, 44... Orifice, 46... Conduit, 48... Passage, 50... Stud bolt, 52... Recess, 60...
Buff full, 61...Stepped portion, 62...Slope, 63...Slanted end, 64...Arc-shaped upright outer wall, 65...Edge, 6
6... Wall part, 67... Step part, 68... Annular sky, 70
... Inclined surface, 72... Spiral surface, 73... Inclined surface, 74...
Opening, 76... Opening, 78... Shoulder, 80... Opening, 8
2... Edge portion, 84, 86, 88... Arrow, 100...
Batsuful, 101...Entrance part, 102...Slope, 1
04...Fin, 106...Cylindrical inner wall portion, 11
0... Arcuate upright outer wall, 112... End, 113... Conduit portion, 114... Opening, 115... Bottom wall, 116...
Vent passage, 118... Pipe line portion, 120... Bottom wall portion, 124... Pipe line, 126... Passage, 128... Passage, 130... Partition wall, 132... Hanging piece.

Claims (1)

Claims: 1. A generally cylindrical casing having upper and lower end walls and defining a fluid storage container; a fluid inlet and a fluid outlet in the upper end wall; an upward flow passageway and a downward flow passage; and an elongated conduit provided along the axial direction within the casing to define a flow passage, the upper end of the downward flow passage opening in the container at a position near the upper end wall. ,
The downward flow passage and the upward flow passage communicate with each other at their respective lower ends, and the upper end of the upward flow passage is connected to the fluid outlet to form a flow passage from the container to the outlet. In such a suction accumulator, a baffle defining a sealed flow path is provided in the casing, and the buffle has a generally spiral upward surface surrounding the fluid outlet. , having an arcuate upright outer wall and a spiral inner wall spaced apart from the upright outer wall;
The upright outer wall extends over a predetermined range of angles such that the buffful receives the flow of refrigerant entering the fluid inlet and directs the flow generally tangential to the inner wall of the casing. A suction accumulator, characterized in that it is adapted to divert the flow into a directed horizontal flow. 2. The gaseous refrigerant flowing from the buffer toward the container first flows downward and then flows upward, thereby entering the open end of the downward flow passage. Inhalation acumulator. 3. The suction accumulator according to claim 1, wherein the upright outer wall having an arcuate shape extends over a range of 130 degrees to 170 degrees. 4. The suction accumulator according to claim 1, wherein the buffer is made of a molded synthetic resin material. 5. The suction accumulator of claim 1, wherein a central portion of the buffle defines a passageway for delivering fluid from the container toward the fluid outlet. 6. The suction accumulator of claim 1, wherein the baffle has a tubular portion communicating the upward flow passageway with the fluid outlet. 7. The suction accumulator of claim 1, wherein the baffle has an opening for direct communication of the container with the fluid outlet. 8. The suction acumulator of claim 1, wherein said elongated conduit has an elongated pressure equalization passageway for direct communication of said container with said upward flow passageway. 9. The diverted flow of the refrigerant is separated into a liquid portion and a gas portion, and the liquid portion is stored in the container after flowing downward in a spiral shape along the wall surface of the cylindrical casing. Claim 1 characterized in that the liquid joins the liquid being
Inhalation acumulators as described in Section.